15720616240 has 160 divisors (see below), whose sum is σ = 43000354944. Its totient is φ = 5232107520.

The previous prime is 15720616237. The next prime is 15720616267. The reversal of 15720616240 is 4261602751.

It is a junction number, because it is equal to n+sod(n) for n = 15720616196 and 15720616205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15767422 + ... + 15768418.

Almost surely, 2^15720616240 is an apocalyptic number.

15720616240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15720616240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21500177472).

15720616240 is an abundant number, since it is smaller than the sum of its proper divisors (27279738704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15720616240 is a wasteful number, since it uses less digits than its factorization.

15720616240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815 (or 1809 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 15720616240 in words is "fifteen billion, seven hundred twenty million, six hundred sixteen thousand, two hundred forty".